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BoP Lab / Classes / GT2

GT2 vs SM vs T4 pace at every track

Lap times across years say as much about the weather as the class. % of GT2 is each class's best lap as a share of GT2's on the same day, so the conditions drop out: 100% is level, less is quicker, and a move in it is the class getting faster or slower against the field.

Class · click a class to switch, + to compare alongside (up to 4)
AS+B-Spec+EP+FA+FC+FE2+FF+FP+FV+FX+GT1+GT2×GTX+HP+P+P2+vsSM×SMX+SRF3+STL+STU+T1+T2+T3+vsT4×Show 51 inactive classes
Series
Reference · what % is measured against, 12 events
Tracks · untick to narrow

Closest to the field: GT2 100.0% of GT2 Jordan Bupp, Daytona International Speedway Runoffs 2015 race · SM 96.2% of GT2 Brian Henderson, Indianapolis Motor Speedway Runoffs 2021 race · T4 93.9% of GT2 John Heinricy, Indianapolis Motor Speedway Runoffs 2021 race

1:402:002:202:4040 rule changes between Runoffs 2018 and Runoffs 201940 ▾53 rule changes between Runoffs 2019 and Runoffs 202053 ▾37 rule changes between Runoffs 2020 and Runoffs 202137 ▾44 rule changes between Runoffs 2021 and Runoffs 202244 ▾40 rule changes between Runoffs 2022 and Runoffs 202340 ▾45 rule changes between Runoffs 2023 and Runoffs 202445 ▾40 rule changes between Runoffs 2024 and Runoffs 202540 ▾41 rule changes between Runoffs 2025 and Runoffs 202641 ▾GT2 race best at Runoffs 2015: 1:53.543 (Jordan Bupp)Off the chart: GT2 race best at Runoffs 2016: 1:26.847 (Andrew Aquilante)GT2 race best at Runoffs 2017: 1:40.976 (Andrew Aquilante)GT2 race best at Runoffs 2018: 1:38.524 (R Spencer Trenery)GT2 race best at Runoffs 2019: 1:52.475 (Andrew Aquilante)GT2 race best at Runoffs 2020: 2:14.279 (Andrew Aquilante)GT2 race best at Runoffs 2021: 2:03.513 (Tim Kezman)GT2 race best at Runoffs 2022: 1:53.048 (Daniel Bender)GT2 race best at Runoffs 2023: 1:52.865 (Jared Odrick)GT2 race best at Runoffs 2024: 2:13.311 (John Atwell)GT2 race best at Runoffs 2025: 2:13.447 (John Atwell)GT2 race best at Runoffs 2026: 2:10.650 (John Atwell)GT2 qualifying best at Runoffs 2015: 1:53.652 (Jordan Bupp)Off the chart: GT2 qualifying best at Runoffs 2016: 1:25.405 (Andrew Aquilante)GT2 qualifying best at Runoffs 2017: 1:39.919 (Andrew Aquilante)GT2 qualifying best at Runoffs 2018: 1:37.203 (Andrew Aquilante)GT2 qualifying best at Runoffs 2019: 1:50.182 (Andrew Aquilante)GT2 qualifying best at Runoffs 2020: 2:12.298 (Andrew Aquilante)GT2 qualifying best at Runoffs 2021: 1:39.665 (Andrew Aquilante)GT2 qualifying best at Runoffs 2022: 1:51.086 (Andrew Aquilante)GT2 qualifying best at Runoffs 2023: 1:52.004 (Barry Boes)GT2 qualifying best at Runoffs 2024: 2:11.860 (Charlie Peter)GT2 qualifying best at Runoffs 2025: 2:11.807 (Brad McAllister)GT2 qualifying best at Runoffs 2026: 2:09.634 (John Atwell)SM race best at Runoffs 2015: 2:24.067 (Todd Lamb)SM race best at Runoffs 2016: 1:40.764 (Michael Carter)SM race best at Runoffs 2017: 1:59.100 (Michael Gagliardo)SM race best at Runoffs 2018: 1:55.278 (Michael Carter)SM race best at Runoffs 2019: 2:16.459 (Elivan Goulart)SM race best at Runoffs 2020: 2:43.748 (Preston Pardus)SM race best at Runoffs 2021: 1:58.837 (Brian Henderson)SM race best at Runoffs 2022: 2:19.107 (Travis Wiley)SM race best at Runoffs 2023: 2:16.229 (Julian DaCosta)SM race best at Runoffs 2024: 2:41.486 (Brett Kowalski)SM race best at Runoffs 2025: 2:44.430 (Kyle Greenhill)SM race best at Runoffs 2026: 2:42.725 (Francisco Barroso)SM qualifying best at Runoffs 2015: 2:18.661 (Andrew Carbonell)SM qualifying best at Runoffs 2016: 1:40.514 (Justin Hille)SM qualifying best at Runoffs 2017: 1:58.306 (Chris Haldeman)SM qualifying best at Runoffs 2018: 1:54.355 (Ken Sutherland)SM qualifying best at Runoffs 2019: 2:14.552 (Todd Buras)SM qualifying best at Runoffs 2020: 2:42.209 (Kyle Greenhill)SM qualifying best at Runoffs 2021: 1:57.695 (Brian Henderson)SM qualifying best at Runoffs 2022: 2:14.664 (Danny Steyn)SM qualifying best at Runoffs 2023: 2:14.986 (Danny Steyn)SM qualifying best at Runoffs 2024: 2:41.106 (Ethan Goulart)SM qualifying best at Runoffs 2025: 2:43.111 (Bobby Gossett)SM qualifying best at Runoffs 2026: 2:42.173 (Brett Kowalski)T4 race best at Runoffs 2015: 2:15.994 (Philip Royle)T4 race best at Runoffs 2016: 1:40.397 (Oscar Jackson)T4 race best at Runoffs 2017: 1:56.923 (Oscar Jackson)T4 race best at Runoffs 2018: 1:54.030 (John Heinricy)T4 race best at Runoffs 2019: 2:10.959 (Nick Leverone)T4 race best at Runoffs 2020: 2:37.881 (Chi Ho)T4 race best at Runoffs 2021: 1:55.929 (John Heinricy)T4 race best at Runoffs 2022: 2:25.443 (John Heinricy)T4 race best at Runoffs 2023: 2:11.962 (Devin Anderson)T4 race best at Runoffs 2024: 2:34.208 (Alex Lozano)T4 race best at Runoffs 2025: 2:32.633 (Alex Lozano)T4 race best at Runoffs 2026: 2:35.757 (Matt Spicuzzi)T4 qualifying best at Runoffs 2015: 2:15.886 (Philip Royle)T4 qualifying best at Runoffs 2016: 1:38.813 (Jonathan Yanca)T4 qualifying best at Runoffs 2017: 1:56.566 (Oscar Jackson)T4 qualifying best at Runoffs 2018: 1:52.339 (Gresham Wagner)T4 qualifying best at Runoffs 2019: 2:11.257 (John Heinricy)T4 qualifying best at Runoffs 2020: 2:37.403 (John Heinricy)T4 qualifying best at Runoffs 2021: 1:54.397 (Stephen Blethen)T4 qualifying best at Runoffs 2022: 2:09.577 (John Heinricy)T4 qualifying best at Runoffs 2023: 2:10.514 (Devin Anderson)T4 qualifying best at Runoffs 2024: 2:34.430 (Matt Spicuzzi)T4 qualifying best at Runoffs 2025: 2:32.956 (Matt Spicuzzi)T4 qualifying best at Runoffs 2026: 2:35.876 (Matt Spicuzzi)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
GT2SMT4solid race · dashed qualifying · slower is lower
100%110%120%40 rule changes between Runoffs 2018 and Runoffs 201940 ▾53 rule changes between Runoffs 2019 and Runoffs 202053 ▾37 rule changes between Runoffs 2020 and Runoffs 202137 ▾44 rule changes between Runoffs 2021 and Runoffs 202244 ▾40 rule changes between Runoffs 2022 and Runoffs 202340 ▾45 rule changes between Runoffs 2023 and Runoffs 202445 ▾40 rule changes between Runoffs 2024 and Runoffs 202540 ▾41 rule changes between Runoffs 2025 and Runoffs 202641 ▾GT2 race best at Runoffs 2015: 100.0% of GT2's (Jordan Bupp)GT2 race best at Runoffs 2016: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2017: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2018: 100.0% of GT2's (R Spencer Trenery)GT2 race best at Runoffs 2019: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2020: 100.0% of GT2's (Andrew Aquilante)GT2 race best at Runoffs 2021: 100.0% of GT2's (Tim Kezman)GT2 race best at Runoffs 2022: 100.0% of GT2's (Daniel Bender)GT2 race best at Runoffs 2023: 100.0% of GT2's (Jared Odrick)GT2 race best at Runoffs 2024: 100.0% of GT2's (John Atwell)GT2 race best at Runoffs 2025: 100.0% of GT2's (John Atwell)GT2 race best at Runoffs 2026: 100.0% of GT2's (John Atwell)GT2 qualifying best at Runoffs 2015: 100.0% of GT2's (Jordan Bupp)GT2 qualifying best at Runoffs 2016: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2017: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2018: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2019: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2020: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2021: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2022: 100.0% of GT2's (Andrew Aquilante)GT2 qualifying best at Runoffs 2023: 100.0% of GT2's (Barry Boes)GT2 qualifying best at Runoffs 2024: 100.0% of GT2's (Charlie Peter)GT2 qualifying best at Runoffs 2025: 100.0% of GT2's (Brad McAllister)GT2 qualifying best at Runoffs 2026: 100.0% of GT2's (John Atwell)SM race best at Runoffs 2015: 126.9% of GT2's (Todd Lamb)SM race best at Runoffs 2016: 116.0% of GT2's (Michael Carter)SM race best at Runoffs 2017: 117.9% of GT2's (Michael Gagliardo)SM race best at Runoffs 2018: 117.0% of GT2's (Michael Carter)SM race best at Runoffs 2019: 121.3% of GT2's (Elivan Goulart)SM race best at Runoffs 2020: 121.9% of GT2's (Preston Pardus)Off the chart: SM race best at Runoffs 2021: 96.2% of GT2's (Brian Henderson)SM race best at Runoffs 2022: 123.1% of GT2's (Travis Wiley)SM race best at Runoffs 2023: 120.7% of GT2's (Julian DaCosta)SM race best at Runoffs 2024: 121.1% of GT2's (Brett Kowalski)SM race best at Runoffs 2025: 123.2% of GT2's (Kyle Greenhill)SM race best at Runoffs 2026: 124.6% of GT2's (Francisco Barroso)SM qualifying best at Runoffs 2015: 122.0% of GT2's (Andrew Carbonell)SM qualifying best at Runoffs 2016: 117.7% of GT2's (Justin Hille)SM qualifying best at Runoffs 2017: 118.4% of GT2's (Chris Haldeman)SM qualifying best at Runoffs 2018: 117.6% of GT2's (Ken Sutherland)SM qualifying best at Runoffs 2019: 122.1% of GT2's (Todd Buras)SM qualifying best at Runoffs 2020: 122.6% of GT2's (Kyle Greenhill)SM qualifying best at Runoffs 2021: 118.1% of GT2's (Brian Henderson)SM qualifying best at Runoffs 2022: 121.2% of GT2's (Danny Steyn)SM qualifying best at Runoffs 2023: 120.5% of GT2's (Danny Steyn)SM qualifying best at Runoffs 2024: 122.2% of GT2's (Ethan Goulart)SM qualifying best at Runoffs 2025: 123.7% of GT2's (Bobby Gossett)SM qualifying best at Runoffs 2026: 125.1% of GT2's (Brett Kowalski)T4 race best at Runoffs 2015: 119.8% of GT2's (Philip Royle)T4 race best at Runoffs 2016: 115.6% of GT2's (Oscar Jackson)T4 race best at Runoffs 2017: 115.8% of GT2's (Oscar Jackson)T4 race best at Runoffs 2018: 115.7% of GT2's (John Heinricy)T4 race best at Runoffs 2019: 116.4% of GT2's (Nick Leverone)T4 race best at Runoffs 2020: 117.6% of GT2's (Chi Ho)Off the chart: T4 race best at Runoffs 2021: 93.9% of GT2's (John Heinricy)Off the chart: T4 race best at Runoffs 2022: 128.7% of GT2's (John Heinricy)T4 race best at Runoffs 2023: 116.9% of GT2's (Devin Anderson)T4 race best at Runoffs 2024: 115.7% of GT2's (Alex Lozano)T4 race best at Runoffs 2025: 114.4% of GT2's (Alex Lozano)T4 race best at Runoffs 2026: 119.2% of GT2's (Matt Spicuzzi)T4 qualifying best at Runoffs 2015: 119.6% of GT2's (Philip Royle)T4 qualifying best at Runoffs 2016: 115.7% of GT2's (Jonathan Yanca)T4 qualifying best at Runoffs 2017: 116.7% of GT2's (Oscar Jackson)T4 qualifying best at Runoffs 2018: 115.6% of GT2's (Gresham Wagner)T4 qualifying best at Runoffs 2019: 119.1% of GT2's (John Heinricy)T4 qualifying best at Runoffs 2020: 119.0% of GT2's (John Heinricy)T4 qualifying best at Runoffs 2021: 114.8% of GT2's (Stephen Blethen)T4 qualifying best at Runoffs 2022: 116.6% of GT2's (John Heinricy)T4 qualifying best at Runoffs 2023: 116.5% of GT2's (Devin Anderson)T4 qualifying best at Runoffs 2024: 117.1% of GT2's (Matt Spicuzzi)T4 qualifying best at Runoffs 2025: 116.0% of GT2's (Matt Spicuzzi)T4 qualifying best at Runoffs 2026: 120.2% of GT2's (Matt Spicuzzi)Daytona International Speedway · Runoffs 2015R2015Mid-Ohio Sports Car Course · Runoffs 2016R2016Indianapolis Motor Speedway · Runoffs 2017R2017Sonoma Raceway · Runoffs 2018R2018Virginia International Raceway · Runoffs 2019R2019Road America · Runoffs 2020R2020Indianapolis Motor Speedway · Runoffs 2021R2021Virginia International Raceway · Runoffs 2022R2022Virginia International Raceway · Runoffs 2023R2023Road America · Runoffs 2024R2024Road America · Runoffs 2025R2025Road America · Runoffs 2026R2026
GT2SMT4solid race · dashed qualifying · each class's best lap as a share of GT2's at the same event (the reference class, changeable above); 100% is level, less is quicker, so up the chart is quicker
EventGT2SMT4
Qual best Race best Trap Qual best Race best Trap vs GT2 % of GT2 Qual best Race best Trap vs GT2 % of GT2 
Road America Runoffs 20262026-09-282:09.634John Atwell · fastest of 18 · top 5 within 4.3s-2.173s (-1.65%)2:10.650John Atwell · fastest of 18 · top 5 within 4.1s-2.797s (-2.10%)163.0Jack Stanford-0.3 mph (-0.2%)2:42.173Brett Kowalski · fastest of 34 · top 5 within 0.3s-0.938s (-0.58%)2:42.725Francisco Barroso · fastest of 35 · top 5 within 0.2s-1.705s (-1.04%)119.6Wyatt Couch+0.3 mph (+0.3%)+32.075squal +32.539s124.6%qual 125.1%2:35.876Matt Spicuzzi · fastest of 12 · top 5 within 2.4s+2.920s (+1.91%)2:35.757Matt Spicuzzi · fastest of 12 · top 5 within 2.7s+3.124s (+2.05%)127.6Matt Spicuzzi-6.0 mph (-4.5%)+25.107squal +26.242s119.2%qual 120.2%
41 rule changes (GT2: 13, SM: 2, T4: 26)8 cars added · 7 weight · 5 suspension & brakes · 4 induction · 4 tyres & wheels · 2 removed · 1 engine · 1 wording · 9 othershowhide
  • T4 02-06 R53 Mini Cooper Hotchkins Rear Camber Arms #40677suspension & brakes
  • T4 Is it time? #40653cars added
  • T4 Combine T4 BRZ/86/FRS generations #40656weight
  • SM Rear Toe Link #40271other
  • T4 Dodge Neon DOHC Weight #40329weight
  • T4 SPB In T4 #39973other
  • T4 02-06 Mini Cooper S #40106weight -50 lbs
  • T4 02-06 Mini Cooper S Fuel #40107other
  • T4 Shock error #40176suspension & brakes
  • T4 Max Tire Sizes #40183tyres & wheels
  • GT2 Panoz Esperante GTS Letter ID Number: #38494 - Additional Info #38584tyres & wheels
  • GT2 Appendix L Update #39923tyres & wheels
  • GT2 GT2 Porsche 997.2 GT3 Cup EDIT #40125other
  • T4 2003 Honda Civic Si Classification #39999cars added
  • GT2 Corvette C7 (14-19) L76 Specline Errors/Missing Changes #39838weight -100 lbs
  • GT2 GT2 Porsche 997.2 GT3 Cup #39936weight
  • SM Part Number Change Request #39914wording
  • T4 16-24 ND MX5 T4 #39934suspension & brakes
  • GT2 Classification Request - Ginetta G56 GT4 (V8) #39625cars added
  • GT2 Remove GT3U from GCR as it is now in STU #39862removed
  • GT2 Audi R8 GT4 remove spec line notes #39864other
  • T4 ND MX-5 Spec Line Rewrite Request #39802weight -100 lbs
  • T4 4.0 Mustang spec line cleanup #39831induction
  • GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2 #39249engine
  • GT2 Classify T1 BMW in GT2 #39408cars added
  • T4 T4 and T3 Feedback #39230removed
  • T4 T4 Mustang 4.0 #39489induction
  • T4 Allow Alt Bushing Material in Toe Links #39607suspension & brakes
  • GT2 Additional Body Options to Replace Older Stock Car Bodies #39086other
  • GT2 GT3 Turbo to GT2? #39365induction
  • GT2 Tech Bulletins for GT2 and GT2-ST #39537cars added -100 lbs
  • T4 Alternate Placement of Fuse Panel and Electronics Request #39370other
  • T4 Clarify T4 Brake Rotor Allowance #39503suspension & brakes
  • T4 Classing 1995-99 Dodge Neon SOHC #39285cars added
  • T4 02-06 Mini Cooper Gear Ratios #38966other
  • T4 Reinstatement of the 2005-2010 Cobalt into T4 #38987cars added
  • T4 Request to Classify Mercedes C230K #39080cars added
  • T4 ND Gearset Request for T4 #39166other
  • T4 E&O wheel size on ND #39168tyres & wheels
  • T4 ND Spec Lines Wrong PT#'s #39170weight
  • T4 Touring 4 Post-Runoffs BOP Adjustments and Changes #39251induction -100 lbs
Road America Runoffs 20252025-09-292:11.807Brad McAllister · fastest of 16 · top 5 within 3.4s-0.053s (-0.04%)2:13.447John Atwell · fastest of 13 · top 5 within 3.6s+0.136s (+0.10%)163.3Charlie Peter-1.0 mph (-0.6%)2:43.111Bobby Gossett · fastest of 32 · top 5 within 0.3s+2.005s (+1.24%)2:44.430Kyle Greenhill · fastest of 28 · top 5 within 0.3s+2.944s (+1.82%)119.3Francisco Barroso-0.6 mph (-0.5%)+30.983squal +31.304s123.2%qual 123.7%2:32.956Matt Spicuzzi · fastest of 10 · top 5 within 3.8s-1.474s (-0.95%)2:32.633Alex Lozano · fastest of 10 · top 5 within 4.3s-1.575s (-1.02%)133.7Alex Lozano+4.4 mph (+3.4%)+19.186squal +21.149s114.4%qual 116.0%
40 rule changes (GT2: 7, SM: 4, T4: 29)7 weight · 6 cars added · 5 tyres & wheels · 4 aero · 3 engine · 2 induction · 2 suspension & brakes · 3 wording · 8 othershowhide
  • GT2 Rear Deck Lid for Older Air-Cooled Porsche #38506aero
  • T4 Incorrect Touring Heading #38451wording
  • T4 Allow B-Spec cars to run in T4 #38439other
  • SM SMX Data Submission - Penalties #38248other
  • SM SMX Penaly Clarification updated language #38337wording
  • T4 T4 Mustang #38059weight -100 lbs
  • T4 SSC tire allowance #38216tyres & wheels
  • SM Clarify Tire Marking Regs #38005tyres & wheels
  • T4 Correct Ring and Pinion Ratio to T3, Sorry I Mean T4 3.7 V6 Stang #38041wording
  • T4 T4 Mustang #38058aero
  • GT2 Hood Bulge allowed #37000engine
  • GT2 OEM Wing Adjustment #37590aero
  • GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty #36538weight
  • T4 Ford Mustang V6 (05-14) #37516other
  • T4 Request to Classify Club Spec in Appropriate Touring Classes #37523cars added
  • GT2 Panoz Esperante GTS BOP #36686cars added
  • GT2 Correct language regarding OEM Areo Devices #37137aero
  • GT2 GT2 Sunbeam Tiger Alternate Carburetor #37198induction
  • T4 Remove spec lines that have expired #37269induction
  • T4 2016-2018 Mazda Miata MX5 #37085weight -75 lbs
  • SM E&O SMX Regs 9.1.7.1.D.5.u-.w #37070other
  • T4 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft #36484suspension & brakes
  • T4 R53 Mini Cooper S Weight Reduction Request #36612weight
  • T4 Allowable Wheel Offset #36855tyres & wheels
  • T4 Fuel Emissions Components #37076engine
  • T4 2019-2024 Mazda 3 for T4 #37077cars added
  • T4 fix brake wording #37129suspension & brakes
  • T4 Evaporative emissions systems #37130engine
  • T4 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision #37140other
  • T4 Move Spec Boxster to T4 #37158cars added
  • T4 3.7 Mustangs to T4 #37188cars added
  • T4 BMW 320i Spec Line #37204other
  • T4 MX5 2006-2015 NC Help #37221other
  • T4 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual #37224cars added
  • T4 Civic SI in T4 #37248weight -50 lbs
  • T4 2006-2015 T4 NC Mx5 spec line #37278weight
  • T4 ND MX-5 wheel allowance #37279tyres & wheels
  • T4 T4 BOP #37281weight +75 lbs
  • T4 Allow 7.5 #37286tyres & wheels
  • T4 Bop Request 06-11 Honda Civic Si #37013other
Road America Runoffs 20242024-10-012:11.860Charlie Peter · fastest of 23 · top 5 within 1.1s-0.438s (-0.33%)2:13.311John Atwell · fastest of 23 · top 5 within 0.9s-0.968s (-0.72%)164.3Jonathan Start+2.1 mph (+1.3%)2:41.106Ethan Goulart · fastest of 49 · top 5 within 0.5s-1.103s (-0.68%)2:41.486Brett Kowalski · fastest of 43 · top 5 within 0.3s-2.262s (-1.38%)119.9Alex Bertagnoli-1.4 mph (-1.2%)+28.175squal +29.246s121.1%qual 122.2%2:34.430Matt Spicuzzi · fastest of 15 · top 5 within 1.8s-2.973s (-1.89%)2:34.208Alex Lozano · fastest of 14 · top 5 within 2.2s-3.673s (-2.33%)129.3Alex Lozano-0.9 mph (-0.7%)+20.897squal +22.570s115.7%qual 117.1%
45 rule changes (GT2: 13, SM: 4, T4: 28)13 weight · 6 suspension & brakes · 5 induction · 4 cars added · 4 engine · 3 aero · 1 removed · 3 wording · 6 othershowhide
  • SM SMX Camera Rule Correction #36496wording
  • SM AIM ECU Protocol #36556engine
  • SM OE versus OEM Definitons #36608other
  • SM Shifter Bushing #36611suspension & brakes
  • T4 T4 Camaro V6 weight reduction #36232weight
  • T4 BOP adjustment for ND MX5s #36345weight -50 lbs
  • GT2 GT2-ST Rule Clarification #36093wording
  • GT2 GT4 cars may run in GT2-ST #36235weight
  • T4 Mustang T2/T3 #35877other
  • T4 Homologation of car to T4 #36030cars added
  • T4 T2-T4 Driveshaft Mistake...? #36050weight
  • T4 MINI Cooper S Spec Lines Corrections. #36086removed
  • T4 Allow Removal of Sound Tubes #36130induction
  • T4 B8/8.5 Audi S4 T3 and T2 #36195cars added
  • T4 Allow OEM Front Spoiler 06-08 Miata in T4 #35941aero
  • T4 T4 Mustang Weight Reduction In T4 Spec #36051weight -50 lbs
  • T4 R53 Mini Cooper S spec line request In #36056suspension & brakes
  • GT2 Request for Spec Line 1010 Reconsideration #35009weight +300 lbs
  • GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2 #35878induction
  • T4 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj. #35761engine
  • T4 2023 ND2 Miata Classification and Allowances #35837weight
  • T4 Errors and Omissions for 06-09 VW Rabbit Rotor #35851suspension & brakes
  • T4 Driveshafts #35916weight
  • T4 GCR ERROR - letter not properly applied to GCR #35999weight
  • T4 Corrections to T4 RX8 Spec line #35767aero
  • GT2 Classify Corvette C8 (2020- ) into GT2/ST #33759cars added
  • GT2 Requesting classification for a 2015 Mitjet ST in GT2 #35408cars added
  • T4 Reorganize Spec Lines #35375induction
  • T4 Allow any 400lb rear spring in the RX8 #35433suspension & brakes
  • T4 370Z Brake Rotor Size Correction #35487suspension & brakes
  • GT2 Rear Blade Spoiler Clarification #35261aero
  • GT2 GT Direct Injection allowance and rules #35437engine
  • GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB #35385weight -150 lbs
  • GT2 GT2/3 remove Direction Injection not allowed in Spec line notes #35439engine
  • T4 More Car Lightening Stuff #35319weight
  • T4 ND Missed Items #35352other
  • T4 Inclusion of B-C spec cars in T4 #35374other
  • T4 T2-T4 Set expiration dates on spec lines #35378induction
  • GT2 Dodge Viper Gen 3 hybrid Kit Update Request #35200induction
  • T4 Mazda MX-5 ND1 Spec Line Request #34232weight +50 lbs
  • T4 BRZ/FRS/86 Spring Allowance #35038suspension & brakes
  • T4 TSX Allowance #35219other
  • T4 Requested Update of Model Years of 370Z #35231other
  • GT2 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules #34453weight
  • GT2 Late E & O #34966wording
Virginia International Raceway Runoffs 20232023-09-231:52.004Barry Boes · fastest of 15 · top 5 within 1.6s+0.918s (+0.83%)1:52.865Jared Odrick · fastest of 15 · top 5 within 1.0s-0.183s (-0.16%)164.0Tom Patton-0.2 mph (-0.1%)2:14.986Danny Steyn · fastest of 52 · top 5 within 0.1s+0.322s (+0.24%)2:16.229Julian DaCosta · fastest of 46 · top 5 within 0.3s-2.878s (-2.07%)120.3Jim Drago+1.1 mph (+0.9%)+23.364squal +22.982s120.7%qual 120.5%2:10.514Devin Anderson · fastest of 24 · top 5 within 0.5s+0.937s (+0.72%)2:11.962Devin Anderson · fastest of 23 · top 5 within 0.1s-13.481s (-9.27%)127.8Raymond Blethen+0.5 mph (+0.4%)+19.097squal +18.510s116.9%qual 116.5%
40 rule changes (GT2: 19, SM: 1, T4: 20)11 weight · 9 induction · 4 cars added · 4 suspension & brakes · 2 aero · 2 engine · 2 tyres & wheels · 2 wording · 4 othershowhide
  • GT2 GT2 Mazda 20B 3 rotor ENO #34765weight -220 lbs
  • T4 Inclusion of similar car. (CLK 320) #34626other
  • T4 Rules Clarification for Mazda RX8 Spec Line #34395weight
  • T4 rule book corrections #34437wording
  • T4 Ride Height Correction for the T3 Solstice. #34615suspension & brakes
  • GT2 appendix letter #33635 #34206weight
  • GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body #34342weight
  • T4 2002-2006 Mini Cooper S R53 Spec Line Request #34336weight -50 lbs
  • T4 05-06 Mini Wheel Weight #34112weight
  • T4 06-09 VW Rabbit #34153induction
  • T4 96-01 Audi a4 2.8 Spring Rate #34217suspension & brakes
  • GT2 Request to class 2011 Porsche Cayman S #33771cars added
  • GT2 Please classify Fields Cardinal V8 #33784cars added
  • GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class #33825engine
  • T4 Request to Classify 2004-2008 Acura TSX in T4 #33590cars added
  • T4 T4 Mustang Brakes/Swaybar #34036suspension & brakes
  • T4 BMW 320I intercooler #33762other
  • GT2 GT2 Mazda 13B Turbo #33729induction
  • T4 2019-2021 Mazda MX5 ND2 #32027cars added
  • T4 Mustang OEM Grill Request #33333other
  • T4 Mazda OEM LSD was letter 32655 typo #33666wording
  • GT2 Request Permission to Use a Substitute Turbo #33337induction
  • GT2 Request to Reduce Restriction on C7 GT2 Corvette #33342induction
  • GT2 Toyota 4A-F and 4A-FE 1.6L DOHC 16V Engine Request #33415engine
  • GT2 GT2 Mazda 13b turbocharger part # update #33437induction
  • GT2 GT2-ST BMW E36/46 spec line remove #33610aero
  • GT2 GT3 Choke option effective 1-01-2023 #33669induction
  • GT2 GT3 2.0L choke/weight option #33670weight
  • GT2 BOP adjustment for GT2 & GT2-ST #33681induction
  • SM BOP for NB1 and NB2 #32309weight
  • T4 Allowable Springs and Sway Bars for 06-11 Civic si Spec Line #33294suspension & brakes
  • T4 Touring (T2-T5) Category #33617tyres & wheels
  • T4 ENO 9.1.9.2.D.1.e.1.a. #33651other
  • GT2 GT2 (TA2)/GTA Part Number Update #33315induction
  • GT2 Ginetta G56 GTA - Optional Wheels #33357tyres & wheels
  • T4 T4 mustang #32789weight -25 lbs
  • T4 Mazda OEM LSD was letter 32655 #32933weight -25 lbs
  • GT2 Allow the MAShaw Body Kit on the GT2/ST Spec Line for BMW E36/E46 #32447aero
  • GT2 Request for C5/C6 Corvette Restrictor Size Review #32982induction
  • T4 Another 2022 BRZ/86 T3 request #32945weight +225 lbs
Virginia International Raceway Runoffs 20222022-09-241:51.086Andrew Aquilante · fastest of 23 · top 5 within 1.1s+0.904s (+0.82%)1:53.048Daniel Bender · fastest of 17 · top 5 within 3.1s+0.573s (+0.51%)164.2Scotty B White+1.4 mph (+0.9%)2:14.664Danny Steyn · fastest of 60 · top 5 within 0.2s+0.112s (+0.08%)2:19.107Travis Wiley · fastest of 58 · top 5 within 0.9s+2.648s (+1.94%)119.2Jonathan Neudorf-0.6 mph (-0.5%)+26.059squal +23.578s123.1%qual 121.2%2:09.577John Heinricy · fastest of 18 · top 5 within 0.7s-1.680s (-1.28%)2:25.443John Heinricy · fastest of 18 · top 5 within 2.5s+14.484s (+11.06%)127.4Nick Leverone-1.5 mph (-1.2%)+32.395squal +18.491s128.7%qual 116.6%
44 rule changes (GT2: 14, SM: 1, T4: 29)11 suspension & brakes · 7 cars added · 5 tyres & wheels · 5 weight · 4 induction · 2 engine · 1 removed · 4 wording · 5 othershowhide
  • GT2 Tail lights on all GT category race cars. #32799suspension & brakes
  • GT2 Addendum to letter #32514 Ginetta GTA G56 #33076cars added
  • GT2 Information requested for carbon roofs on BMW E36/E46 cars in GT2 #32682wording
  • GT2 Request to Allow the 95mm S54 BMW Crankshaft in GT2-ST #32698other
  • GT2 Request to classify Audi R8 FIA GT4 to GT2 #32805cars added
  • T4 04-09 Mazda3 Balance Shaft Delete Kit #32795other
  • T4 Request Wider Wheels for Hyundai Tiburon #32536tyres & wheels
  • GT2 Typo in rules for shocks #32308suspension & brakes
  • GT2 additional response to letters #31898 & 32083 #32424weight +140 lbs
  • T4 Request to Add Spec Line for 2004-2009 Mazda3 i 2.0 #32395weight
  • T4 Request Alternate Front & Rear Strut/Shock Top Hats #32452suspension & brakes
  • SM Update GCR Section 9.1.7.3.A.1. #32217suspension & brakes
  • T4 Request to Allow the Use of Aftermarket ECU's in Touring #31067engine
  • T4 Request JWT BSR Kit for 02-06 Nissan Sentra SE-R/Spec V #31685other
  • T4 Please Confirm Touring 4 (98-00) BMW 323 is E46 generation #31972other
  • T4 RX-8 Spring Part Numbers (E&O) #32151suspension & brakes
  • T4 04-09 Mazda3 Tire Limit Clarification #32249tyres & wheels
  • T4 Shock Part Number Errors & Omissions #32252suspension & brakes
  • T4 Update Solo Spec Coupe to latest '20 specs for Road Racing #32262other
  • T4 Request 2016 Mazda MX5 springs #32265suspension & brakes
  • GT2 Request to Classify Ginetta G40 in GT2 #31597cars added
  • GT2 2021 Supra GR GT4 #31737cars added
  • GT2 Proposed Technical Bulletin #31900induction
  • T4 Reply to letter #31486/29879 T2-T4 Grill openings #31935suspension & brakes
  • T4 BRZ vs BRZ TS #32022tyres & wheels
  • GT2 GT2/ST Porsche Cayman #31451 correct TBR size error #31991wording
  • T4 MX-5 Durability Detailed #31102weight
  • T4 Request Allowances for 2005 - 2010 Mustang #31624wording
  • GT2 Restrictor Clarification for 2015 Cayman #31451induction
  • T4 Reply to letter 29879 T2-T4 Grill Openings #31486suspension & brakes
  • T4 Please Adjust 98-00 BMW 323 Min Weight to Reflect Current Class #31595weight -200 lbs
  • T4 Consolidate 12-13 and 14-15 Honda Civic Si spec lines for T4 #31596removed
  • T4 Request to clarify radiator hoses #31682wording
  • T4 Clarify Permitted/Allowed #31743suspension & brakes
  • T4 Correct RSX wording #31746tyres & wheels
  • T4 Camaro #31751suspension & brakes
  • T4 Nissan Sentra SE-R Spec. V #30958cars added
  • T4 Mazda RX-8 Spec Line Suspension Parts #31113induction
  • T4 Diverter Valve Plunger Upgrade #31307engine
  • T4 Adjust Honda FWD in T4 to encourage more Drivetrain Diversity #31472tyres & wheels
  • T4 Touring 4 BOP adjustments for 2022 #31482weight -175 lbs
  • T4 Request to Classify 2014 VW Jetta 1.8t TSI #30436cars added
  • GT2 Turbo Request for 13B Engine #30656induction
  • GT2 Request car classification #31032cars added
Indianapolis Motor Speedway Runoffs 20212021-09-251:39.665Andrew Aquilante · fastest of 22 · top 5 within 1.8s-0.254s (-0.25%)2:03.513Tim Kezman · fastest of 18 · top 5 within 9.6s+22.537s (+22.32%)163.7Jonathan Start1:57.695Brian Henderson · fastest of 90 · top 5 within 0.5s-0.611s (-0.52%)1:58.837Brian Henderson · fastest of 88 · top 5 within 0.3s-0.263s (-0.22%)119.8Kyle Greenhill-4.676squal +18.030s96.2%qual 118.1%1:54.397Stephen Blethen · fastest of 47 · top 5 within 0.9s-2.169s (-1.86%)1:55.929John Heinricy · fastest of 46 · top 5 within 1.0s-0.994s (-0.85%)127.3Alexander Schefer-7.584squal +14.732s93.9%qual 114.8%
37 rule changes (GT2: 16, SM: 1, T4: 20)9 weight · 5 engine · 4 cars added · 4 tyres & wheels · 2 induction · 2 suspension & brakes · 3 wording · 8 othershowhide
  • GT2 Correct letter 30565 GT2/ST #31088weight
  • GT2 Request the 04-06 Pontiac GTO WC Car Be Added to the GT2/ST Chart #30339cars added
  • GT2 Request to Update GTA Obsolete Part Numbers #30615wording
  • GT2 GTX class correction to GT2/ST #30973cars added
  • GT2 Porsche Cayman Engine Modification and Engine Request #30472engine
  • GT2 Request weight clarification Viper CC #30565weight
  • GT2 Variance, 2021 TA2 Rules vs GCR Appendix L #30641weight
  • T4 Wrong Part Number on 320i Spec Line #30645wording
  • T4 Civic Type R Brake Rotors #29817suspension & brakes
  • T4 Mini Cooper Spec Line Anomalies #30478weight
  • T4 Request CAI Mustang in T4 #30562induction
  • GT2 GT2 tiger firing order #30421engine
  • SM Updates - Obsolete Parts & BOP Parts #30438other
  • T4 Request consistency review in GCR #30263other
  • GT2 GT2-ST CORVETTE CHANGES #30029weight +100 lbs
  • GT2 Request underfloor clarification #30121tyres & wheels
  • GT2 29742 Change new wording to read as: #30329engine
  • T4 E & O T4 Mustang Wheels #30245tyres & wheels
  • GT2 ABS Restrictions #30064other
  • GT2 RM 21-01 C6 & C7 clarification #30192weight
  • T4 2021 Toyota Supra #29567cars added
  • T4 06-15 MX-5 Durability #29781other
  • T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-) #29838induction
  • T4 NC MX-5 06-15 Part Number updates for 2021 #29921weight
  • T4 BMW Z4 2.5L (03-05) Spec Line #30037weight -50 lbs
  • T4 Sway Bars for T4 2016+ MX5 Mazda #30063suspension & brakes
  • T4 Change part numbers on BRZ, FRS lines in T4 #30104wording
  • T4 T4 Mustang Axle Ratio and Wheels #30149tyres & wheels
  • GT2 Request change to engine firing order rule #29742engine
  • GT2 Request E-46 BMW M3 balance of performance #29833weight -100 lbs
  • T4 Request to Classify BMW M2 CS #29523cars added
  • T4 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5 #29681other
  • T4 Request Mustang 8.8” rear axle replacement #29860other
  • T4 Cap year range on all 86s #29908other
  • GT2 Request for Bigger Engine in Plymouth Breeze #29380engine
  • T4 Alfa Romeo 4C Launch Edition #29531other
  • T4 Post Runoffs Feedback for T4 #29752tyres & wheels -50 lbs
Road America Runoffs 20202020-10-022:12.298Andrew Aquilante · fastest of 20 · top 5 within 2.9s2:14.279Andrew Aquilante · fastest of 19 · top 5 within 2.4s162.2Scotty B White2:42.209Kyle Greenhill · fastest of 77 · top 5 within 0.5s2:43.748Preston Pardus · fastest of 75 · top 5 within 1.0s121.3Kyle Greenhill+29.469squal +29.911s121.9%qual 122.6%2:37.403John Heinricy · fastest of 20 · top 5 within 2.5s2:37.881Chi Ho · fastest of 19 · top 5 within 1.6s130.2Chi Ho+23.602squal +25.105s117.6%qual 119.0%
53 rule changes (GT2: 26, SM: 2, T4: 25)11 weight · 5 aero · 5 cars added · 5 engine · 5 suspension & brakes · 4 induction · 2 tyres & wheels · 6 wording · 10 othershowhide
  • GT2 rescind GT2 stock car bodies removal #29219other
  • GT2 E&O Typos in Appendix L #29447wording
  • GT2 GT2 wing width wording correction #29469aero
  • SM Radiator E&O Clarifications #29294engine
  • GT2 GT Category Wording #29193induction
  • GT2 Corvette GT2-ST intake manifold #29221induction
  • GT2 997.2 E&O link to 27915 #29373other
  • GT2 Request for allowance Trans Am SGT #28951weight
  • GT2 Omitted GT2 fender/hood openings #29171other
  • SM Modifications to prevent failures of Rear Brake Caliper Pin #28953suspension & brakes
  • T4 Scion FRS Solo Spec Coupe Gear Ratio #29021other
  • GT2 TA2 Gurney flap wicker clarification #28874aero
  • GT2 STO Gurney flap wicker clarification #28883aero
  • GT2 GT Gurney flap wicker clarification #28909aero
  • T4 T4 RX8 bodywork clarification #28941aero
  • T4 2006-2015 MX-5 Clarification #28942tyres & wheels
  • T4 Request to Add a Vehicle to the Roster (contd.) #27698other
  • GT2 Request to Adjust Weight of OEM 8.4 Viper #28739weight -50 lbs
  • GT2 Request to Adjust Weight of OEM Chevrolet Corvette #28896weight -50 lbs
  • T4 Request to Classify 2004 Mercedes Benz 320 CLK #27663cars added
  • GT2 Request Corvette engine parity #28576engine
  • T4 Request to change allowed header part # for T4 06-15 Miata #28223wording
  • T4 Z3M Roadster Weight #28437weight
  • GT2 Request to revisit Panoz GT-S BoP #28280engine
  • GT2 GT2-ST Corvette LS2 & L76 #28583weight
  • GT2 GT2-ST Corvette L76 #28584weight
  • GT2 Request 991.2 Porsche engine displacement verify typo #28194engine
  • T4 Request for 12-13 and 14-15 Honda Civic Springs #27848suspension & brakes
  • T4 Request to Clarify T4 05-10 Mustang Spring Allowance #27899suspension & brakes
  • GT2 Windshield Clips #27323other
  • GT2 Request to Add Chevrolet SS Body to Appendix L #27898wording
  • T4 Request to Allow Brake Upgrade on T4 Mustang #27329suspension & brakes
  • T4 Please Switch the Solstice GXP as Specified in T2, to T3 #27413weight -50 lbs
  • T4 Request to Classify all Mazda RX8 Models in T3/T4 #27606cars added
  • T4 Request for 2014-2018 Mazda 3 GT Brakes #27659suspension & brakes
  • T4 Request to allow aftermarket OEM coolant expansion tank #27763engine
  • T4 Request to allow aftermarket OEM power steering reservoir #27764wording
  • T4 Request for Factory Installed Wings on Subaru BRZ #27831other
  • T4 Request for Replacement Clutches #27892other
  • T4 Request to Classify Chevy Sonic 1.4 In T4 #27906cars added
  • T4 Weight Change Request for 1999 Mazda Miata #28129weight -50 lbs
  • GT2 Request Factory Five Daytona coupe classification #26308cars added
  • GT2 Porsche 991.2 GT3 Cup GT2 Classification #27701cars added
  • GT2 Request for Acura NSX Spec Line Changes #27755weight
  • GT2 GT2 991.1 restrictor size change #27914induction
  • GT2 GT2 996/997.1 weight change #27915weight -100 lbs
  • GT2 GT2/ST Corvette comp adjustment #27920induction
  • T4 Clarification of On-Board Fire System for T2 #27183wording
  • T4 Mustang Ecoboost and GT Transmission #27439other
  • T4 BRZ/FRS/86 Tire Size in T4 #27660tyres & wheels
  • T4 NC MX5 2006-2015 Spec Adjustment Request #27739weight -75 lbs
  • T4 T4 RX8 Classification Error #27902wording
  • T4 Request to add Toyota 86 GT to Spec Line #27910other
Virginia International Raceway Runoffs 20192019-10-051:50.182Andrew Aquilante · fastest of 24 · top 5 within 4.5s1:52.475Andrew Aquilante · fastest of 19 · top 5 within 3.3s162.8Tom Patton2:14.552Todd Buras · fastest of 60 · top 5 within 0.2s2:16.459Elivan Goulart · fastest of 56 · top 5 within 0.4s119.8Jim Drago+23.984squal +24.370s121.3%qual 122.1%2:11.257John Heinricy · fastest of 25 · top 5 within 0.2s2:10.959Nick Leverone · fastest of 25 · top 5 within 0.6s128.9Tommy Boileau+18.484squal +21.075s116.4%qual 119.1%
40 rule changes (GT2: 21, SM: 4, T4: 15)12 weight · 9 cars added · 6 engine · 4 suspension & brakes · 2 tyres & wheels · 1 induction · 4 wording · 2 othershowhide
  • T4 Request spare tire/wheel clarification #27012tyres & wheels
  • T4 Research E&O Mazda MX5 #27112weight
  • GT2 TA2 Weight Clarification #27077weight
  • T4 MR2 Spyder Year Correction #26936wording
  • GT2 Request to classify Toyota Supra with 3SGTE engine #25185cars added
  • GT2 Request to Classify Acura NSX from T1 to GT2? #26121cars added
  • GT2 Request for TA2 BOP in GT2 #26509weight
  • T4 Request to allow piggy back ECU on 2000 Mazda Protégé #26085engine
  • T4 Request helper spring as optional #26678suspension & brakes
  • GT2 Request for e36/e46 bmw 4500 cc v8 at 2950lbs in GT2/ST #26106engine
  • GT2 Request GTX Fuel injection for previous GT-1 tube frame cars #26141engine
  • GT2 Request to Classify Ligier JS2 R #26535cars added
  • GT2 Request Ford Perfomance 5.2L crate engine FPR clarification #26159engine
  • GT2 Request Ride Height Clarification #26600suspension & brakes
  • T4 Request to classify 2000 - 2001 BMW 323 #25096cars added
  • GT2 Request Porsche Cayman year classification #26241other
  • GT2 GT2/ST Porsche Cayman engine #26250engine
  • SM Request to allow aftermarket fuel filters. #26370wording
  • T4 Correct Mazda MX-5 Hard Top Notes #26137weight
  • T4 Consider opening class rules to allow any thermostat #26187wording
  • T4 Cap 2016 Mazda Miata year at 2018 #26388other
  • SM Request 99-00 replacement Wire harnesses #25602engine
  • SM Organize and Clarify 9.1.7.C.1.o. #25913weight
  • SM Strike Tire Tread Language #26123tyres & wheels
  • T4 2012-2015 Honda Civic Si Performance Request #26129suspension & brakes
  • GT2 ST/GT2 BMW Flossman Kit Clarification #22138wording
  • GT2 Request Clarification/Revision of Appendix L (2013 TA2 Rules) #25110weight
  • GT2 Request to classify BMW E82 (1 series) into GT2 #25539cars added
  • GT2 2010 Cayman Street Tuner Into an STO Car,Addendum #25545weight
  • GT2 Request - Classify Ford Performance 5.2l #25716cars added
  • GT2 Add missing displacement, minimum weight. Remove #25765weight
  • GT2 Request for Ford FP 350s Weight Reduction #25806weight
  • GT2 Request to Classify EcoBoost Mustang #25842cars added
  • GT2 Request to Remove Mazda RX 7 Body Work Penalty #26024weight
  • GT2 GTX Homologation table update #26034cars added
  • T4 Errors, Omissions, and Updates (Various) #22414weight
  • T4 Request for Adjustments to fiat 124 specline #25371induction
  • T4 Add Clarification to Spec Car Classifications Vehicle Spec #25774weight
  • T4 Clarify Subframe Bushings Permitted for T2-T4 #25800suspension & brakes
  • T4 Consider Solo SSC cross over classification into T4 #25802cars added
Sonoma Raceway Runoffs 20182018-10-101:37.203Andrew Aquilante · fastest of 22 · top 5 within 2.1s1:38.524R Spencer Trenery · fastest of 19 · top 5 within 1.3s133.8Michael McAleenan1:54.355Ken Sutherland · fastest of 48 · top 5 within 0.7s1:55.278Michael Carter · fastest of 48 · top 5 within 0.3s102.2Danny Steyn+16.754squal +17.152s117.0%qual 117.6%1:52.339Gresham Wagner · fastest of 12 · top 5 within 1.1s1:54.030John Heinricy · fastest of 12 · top 5 within 0.2s106.0Ross Murray+15.506squal +15.136s115.7%qual 115.6%
No rule changes on record between these events
Indianapolis Motor Speedway Runoffs 20172017-09-251:39.919Andrew Aquilante · fastest of 36 · top 5 within 2.9s1:40.976Andrew Aquilante · fastest of 35 · top 5 within 2.6s1:58.306Chris Haldeman · fastest of 86 · top 5 within 0.5s1:59.100Michael Gagliardo · fastest of 83 · top 5 within 0.6s+18.124squal +18.387s117.9%qual 118.4%1:56.566Oscar Jackson · fastest of 40 · top 5 within 0.6s1:56.923Oscar Jackson · fastest of 38 · top 5 within 1.1s+15.947squal +16.647s115.8%qual 116.7%
No rule changes on record between these events
Mid-Ohio Sports Car Course Runoffs 20162016-09-191:25.405Andrew Aquilante · fastest of 21 · top 5 within 2.8s1:26.847Andrew Aquilante · fastest of 19 · top 5 within 1.5s1:40.514Justin Hille · fastest of 45 · top 5 within 0.3s1:40.764Michael Carter · fastest of 44 · top 5 within 0.3s+13.917squal +15.109s116.0%qual 117.7%1:38.813Jonathan Yanca · fastest of 34 · top 5 within 2.0s1:40.397Oscar Jackson · fastest of 32 · top 5 within 0.8s+13.550squal +13.408s115.6%qual 115.7%
No rule changes on record between these events
Daytona International Speedway Runoffs 20152015-09-211:53.652Jordan Bupp · fastest of 27 · top 5 within 1.2s1:53.543Jordan Bupp · fastest of 22 · top 5 within 1.7s2:18.661Andrew Carbonell · fastest of 62 · top 5 within 0.6s2:24.067Todd Lamb · fastest of 59 · top 5 within 0.8s+30.524squal +25.009s126.9%qual 122.0%2:15.886Philip Royle · fastest of 22 · top 5 within 0.9s2:15.994Philip Royle · fastest of 20 · top 5 within 1.6s+22.451squal +22.234s119.8%qual 119.6%

By track

TrackEvents Typical % of GT2 Best Latest 
Road America4100.0%100.0%Runoffs 2020100.0%Runoffs 2026
Virginia International Raceway3100.0%100.0%Runoffs 2019100.0%Runoffs 2023
Indianapolis Motor Speedway2100.0%100.0%Runoffs 2017100.0%Runoffs 2021
Daytona International Speedway1100.0%100.0%Runoffs 2015100.0%Runoffs 2015
Mid-Ohio Sports Car Course1100.0%100.0%Runoffs 2016100.0%Runoffs 2016
Sonoma Raceway1100.0%100.0%Runoffs 2018100.0%Runoffs 2018
About this data
Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of GT2's best on the same day: the weather and the day cancel out, so one figure compares across years where lap times cannot; a class that suits one track more than another still reads differently there. It still moves when the yardstick's own balance changes or its field thins, and an event the yardstick did not run has no point. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.